Tailored growth of single-crystalline InP tetrapods

Youngsik Kim, Hyekyoung Choi, Yeunhee Lee, Weon-kyu Koh, Eunhye Cho, Taewan Kim, Hamin Kim, Yong-Hyun Kim (), Hu Young Jeong () and Sohee Jeong ()
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Youngsik Kim: Sungkyunkwan University (SKKU)
Hyekyoung Choi: Sungkyunkwan University (SKKU)
Yeunhee Lee: Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST)
Weon-kyu Koh: Sungkyunkwan University (SKKU)
Eunhye Cho: Sungkyunkwan University (SKKU)
Taewan Kim: Sungkyunkwan University (SKKU)
Hamin Kim: Sungkyunkwan University (SKKU)
Yong-Hyun Kim: Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST)
Hu Young Jeong: UNIST Central Research Facilities, Ulsan National Institute of Science and Technology (UNIST)
Sohee Jeong: Sungkyunkwan University (SKKU)

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract Despite the technological importance of colloidal covalent III-V nanocrystals with unique optoelectronic properties, their synthetic process still has challenges originating from the complex energy landscape of the reaction. Here, we present InP tetrapod nanocrystals as a crystalline late intermediate in the synthetic pathway that warrants controlled growth. We isolate tetrapod intermediate species with well-defined surfaces of (110) and ( $$\bar{1}\bar{1}\bar{1}$$ 1 ¯ 1 ¯ 1 ¯ ) via the suppression of further growth. An additional precursor supply at low temperature induces $$[\bar{1}\bar{1}\bar{1}]$$ [ 1 ¯ 1 ¯ 1 ¯ ] -specific growth, whereas the [110]-directional growth occurs over the activation barrier of 65.7 kJ/mol at a higher temperature, thus finalizes into the (111)-faceted tetrahedron nanocrystals. We address the use of late intermediates with well-defined facets at the sub-10 nm scale for the tailored growth of covalent III-V nanocrystals and highlight the potential for the directed approach of nanocrystal synthesis.

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-24765-7

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DOI: 10.1038/s41467-021-24765-7

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